spark spectra of lead, tin, antimony, bismuth, arid gold. 221 
X 
Inten- 
sity 
dX/X 2 
3009-27 
1 r. b. 
+ 2-00 s 
0 p 
-2-02 s 
The two extreme constituents were only a shade weaker 
than the middle one. They are comparable with 
those of Pb 3639-72 (p. 219). 
2863-47 
1 r. b. 
+ 1-95 s 
0 p 
-1-98 s 
do. 
2850-68 
2 
+ 1-30 s 
0 p 
-1-30 s 
The middle constituent was removed by calcite. The 
• constituents were weak and diffuse. Compare Pb 2823 
(p. 220). 
2840-07 
1 r. b. 
+ 2-00 s 
0 p 
-2-02 s 
The two extreme constituents were only a shade weaker 
than the middle one. 
2706-68 
1 r. 
+ 2-19 s 
0 p 
-2-22 s 
do. 
Antimony. 
The line 2877T was divided into five constituents ; but they 
were only seen well separated on analysis by the calcite. The 
measurements were taken between corresponding ones. 
2877-1 
1 
+ 2-22 s 
+ l-05p 
0 s 
- 1-05 p 
-2-22 s 
The middle constituent was much stronger than the 
other four ; the two adjoining ones, vibrating parallel, 
were about half as strong, whilst the two extreme 
ones, vibrating perpendicular, were about half as 
strong as the two vibrating parallel. There is a 
simple numerical relationship between the con- 
stituents, and the numbers are comparable with the 
quadruplets of 3722 - 93 and 3638-01. 
The following lines were divided into four constituents ; and 
only seen well separated on analysis. The measurements were 
taken between corresponding ones. 
3722-93 
+ 2-21 s 
2 
+ 1-01 
0 
-1-01 23 
-2-21 s 
+ 2-11 s 
2 
+ 0-9923 
0 
-0-9923 
-2-11 s 
The constituents were weak, but they were equally sharp 
and strong. They are comparable with those of 
3638-01, Pb 3740-1 and Pb 2873-41 (p. 219). 
3638-01 
do. 
